---
title: "ARTsolar vs G-STAR - Brand Comparison | ComparePV"
description: "Compare ARTsolar vs G-STAR solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/artsolar-vs-g-star"
---

# ARTsolar vs G-STAR

G-STAR has the broader catalog (36 vs 0 models). G-STAR leans bifacial (86% of lineup).


## The two companies


| Attribute | ARTsolar | G-STAR |
| --- | --- | --- |
| Country | South Africa |  |
| Headquarters | Durban |  |
| Founded | 2010 |  |
| Employees |  |  |
| Annual capacity |  |  |
| Tier 1 | no | no |
| Listed |  |  |
| Website | [https://www.artsolar.co.za](https://www.artsolar.co.za) |  |


## Catalog & Power


| Measure | ARTsolar | G-STAR | Margin |
| --- | --- | --- | --- |
| Panel Models | 0 | 36 | +36 |
| Max Power | 0 W | 725 W | +725 W |
| Avg Power | 0 W | 562 W | +562 W |


## Efficiency


| Measure | ARTsolar | G-STAR | Margin |
| --- | --- | --- | --- |
| Max Efficiency | - | 23.51% |  |
| Avg Efficiency | - | 22.41% |  |


## Reliability & Warranty


| Measure | ARTsolar | G-STAR | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | - | -0.307%/°C |  |
| Bifacial Share | 0 (0%) | 31 (86%) | +86 pp |
| Avg Warranty | - | 30.0 yrs |  |


## Efficiency distribution

G-STAR skews to higher efficiency: 28% of lineup is 23%+


| Efficiency band | ARTsolar | G-STAR |
| --- | --- | --- |
| 20-21% | 0 | 3 (8.3%) |
| 21-22% | 0 | 5 (13.9%) |
| 22-23% | 0 | 18 (50.0%) |
| 23%+ | 0 | 10 (27.8%) |


## Power distribution

G-STAR offers more 600W+ panels (36% of lineup)


| Power band | ARTsolar | G-STAR |
| --- | --- | --- |
| 400-499W | 0 | 11 (30.6%) |
| 500-599W | 0 | 12 (33.3%) |
| 600-699W | 0 | 7 (19.4%) |
| 700W+ | 0 | 6 (16.7%) |


## Cell technology

Dominant cell tech: **TOPCon** (72%)


| Technology | ARTsolar | G-STAR |
| --- | --- | --- |
| TOPCon | 0 | 26 (72.2%) |
| N-type | 0 | 5 (13.9%) |
| PERC | 0 | 5 (13.9%) |


## Top panels, G-STAR


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [GSD8K66T-725WT](https://comparepv.com/panel/g-star-gsd8k66t-725wt) | 725 | 23.3 | -0.300 | Monocrystalline |
| 2 | [GSD8K66T-720WT](https://comparepv.com/panel/g-star-gsd8k66t-720wt) | 720 | 23.2 | -0.300 | Monocrystalline |
| 3 | [GSD8K66T-715WT](https://comparepv.com/panel/g-star-gsd8k66t-715wt) | 715 | 23.0 | -0.300 | Monocrystalline |
| 4 | [GSD8K66T-710WT](https://comparepv.com/panel/g-star-gsd8k66t-710wt) | 710 | 22.9 | -0.300 | Monocrystalline |
| 5 | [GSD8K66T-705WT](https://comparepv.com/panel/g-star-gsd8k66t-705wt) | 705 | 22.7 | -0.300 | Monocrystalline |
| 6 | [GSD8K66T-700WT](https://comparepv.com/panel/g-star-gsd8k66t-700wt) | 700 | 22.5 | -0.300 | Monocrystalline |
| 7 | [GSD8R66T-635WT](https://comparepv.com/panel/g-star-gsd8r66t-635wt) | 635 | 23.5 | -0.300 | Monocrystalline |
| 8 | [GSD8R66T-630WT](https://comparepv.com/panel/g-star-gsd8r66t-630wt) | 630 | 23.3 | -0.300 | Monocrystalline |
| 9 | [GSD8R66T-625WT](https://comparepv.com/panel/g-star-gsd8r66t-625wt) | 625 | 23.1 | -0.300 | Monocrystalline |
| 10 | [GSD8R66T-620WT](https://comparepv.com/panel/g-star-gsd8r66t-620wt) | 620 | 22.9 | -0.300 | Monocrystalline |


## Summary

ARTsolar is a South African manufacturer founded in 2010 and widely recognized as the country's only 100% locally owned PV module producer. Its facility, equipped with Swiss and German technology and operated in partnership with JA Solar, runs at a production capacity of roughly 250 MW per year - a modest footprint by global standards. G-STAR Pte. Ltd., headquartered in Singapore and established around 2019, operates at a significantly larger scale, with integrated production capacity in Southeast Asia projected at approximately 3 GW by 2025 and a total claimed capacity of 17.5 GW. The company ranked 467th on the 2024 Global Top 500 New Energy Enterprises list. Neither manufacturer appears on the BloombergNEF Tier 1 bankability list, which puts both outside the institutional comfort zone required for large non-recourse financed projects. Between the two, G-STAR carries the stronger international footprint by volume, while ARTsolar holds a unique strategic position as a domestic producer serving South Africa's localization-driven procurement environment.

On portfolio character, the two brands diverge noticeably. ARTsolar's current lineup consists of a single panel rated at 600 Wp with a peak efficiency of 23.21%, built entirely on TOPCon cell technology, with no bifacial option available. Its temperature coefficient sits at -0.31% per degree Celsius. G-STAR fields a broader catalog of 12 panels averaging 517.5 Wp and reaching up to 595 Wp, with an average efficiency of 22.27% and a top efficiency of 23.03%. Roughly 58% of its lineup is bifacial and built on TOPCon, with the remainder using older architectures. G-STAR's temperature coefficient averages -0.30% per degree Celsius - marginally better in hot climates. Both brands offer 30-year warranties. ARTsolar's single high-power offering suits contractors looking for a straightforward, high-efficiency commercial or large residential module with local South African content. G-STAR's wider range and bifacial options make it more adaptable to varied project types, from standard rooftops to small ground-mount installations where rear-side gain matters.

For a typical buyer in 2025, the choice depends heavily on geography and project type. Within South Africa, ARTsolar carries a clear procurement advantage wherever local content requirements apply, and its 600 Wp, 23.21% module is competitive at the technical level. For buyers outside South Africa - or for projects where bifacial panels add meaningful yield - G-STAR's broader catalog and larger manufacturing base offer more flexibility, though the lack of Tier 1 status means project finance will still require additional due diligence for either brand. The two are genuinely comparable on efficiency and warranty terms; the real differentiators are geographic context and product breadth, not raw panel performance.

\---LINKS---

\- https://www.engineeringnews.co.za/article/artsolar-and-ja-solar-driving-south-africas-renewable-energy-revolution-2025-06-12 \| ARTsolar and JA Solar driving South Africa's renewable energy revolution \| article

\- https://www.pv-magazine.com/2024/10/15/gstar-introduces-440-w-topcon-solar-module-with-framless-design/ \| Gstar introduces 440 W TOPCon solar module with frameless design \| article

\- https://www.enfsolar.com/g-star \| G-STAR Pte. Ltd. - Solar Panels - Singapore - ENF Solar Directory \| article

\- https://www.solarreviews.com/blog/pros-cons-tier-1-vs-tier-2-solar-panels \| Tier 1 vs. Tier 2 Solar Panels - What You Need to Know \| article

Sources:

\- \[ARTsolar and JA Solar: Driving South Africa's renewable energy revolution\](https://www.engineeringnews.co.za/article/artsolar-and-ja-solar-driving-south-africas-renewable-energy-revolution-2025-06-12)

\- \[Gstar introduces 440 W TOPCon solar module with frameless design - pv magazine\](https://www.pv-magazine.com/2024/10/15/gstar-introduces-440-w-topcon-solar-module-with-framless-design/)

\- \[G-STAR Pte. Ltd. - ENF Solar Directory\](https://www.enfsolar.com/g-star)

\- \[Tier 1 vs. Tier 2 Solar Panels - SolarReviews\](https://www.solarreviews.com/blog/pros-and-cons-of-tier-1-vs-tier-2-solar-panels)

Written by claude-sonnet from the figures above.


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Source: https://comparepv.com/artsolar-vs-g-star